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WO1996000877A1 - Four a arc electrique pour la fusion de ferrailles - Google Patents

Four a arc electrique pour la fusion de ferrailles Download PDF

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Publication number
WO1996000877A1
WO1996000877A1 PCT/AT1995/000064 AT9500064W WO9600877A1 WO 1996000877 A1 WO1996000877 A1 WO 1996000877A1 AT 9500064 W AT9500064 W AT 9500064W WO 9600877 A1 WO9600877 A1 WO 9600877A1
Authority
WO
WIPO (PCT)
Prior art keywords
electric arc
arc furnace
charging
furnace according
charging shaft
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/AT1995/000064
Other languages
German (de)
English (en)
Inventor
Harald Berger
Peter Mittag
Heinrich Auberger
Peter Wimmer
Johann Auer
Alfred Weber
Johannes Steins
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Primetals Technologies Austria GmbH
Original Assignee
Voest Alpine Industrienlagenbau GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Voest Alpine Industrienlagenbau GmbH filed Critical Voest Alpine Industrienlagenbau GmbH
Priority to US08/605,011 priority Critical patent/US5835524A/en
Priority to EP95912948A priority patent/EP0719402A1/fr
Priority to DE29580394U priority patent/DE29580394U1/de
Priority to JP8502629A priority patent/JPH09502514A/ja
Publication of WO1996000877A1 publication Critical patent/WO1996000877A1/fr
Priority to KR1019960700940A priority patent/KR100236482B1/ko
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Electric arc furnaces ; Tank furnaces
    • F27B3/10—Details, accessories or equipment, e.g. dust-collectors, specially adapted for hearth-type furnaces
    • F27B3/18—Arrangements of devices for charging
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Electric arc furnaces ; Tank furnaces
    • F27B3/10—Details, accessories or equipment, e.g. dust-collectors, specially adapted for hearth-type furnaces
    • F27B3/18—Arrangements of devices for charging
    • F27B3/183—Charging of arc furnaces vertically through the roof, e.g. in three points

Definitions

  • the invention relates to a scrap-melting electric arc furnace, in particular for melting iron-containing scrap and, if appropriate, sponge iron for the production of steel.
  • the energy input from the single arc is concentrated at a point more or less in the middle of the furnace and is still influenced by magnetic influences which act on the arc at high powers
  • the object of the invention is to further develop an electric arc furnace of the type described last in such a way that, despite the high melting capacity, the furnace vessel can be used with a simple shape - which is easy to manufacture.
  • Proven oven vessels i.e. conventional ones with an upper part with a vertical side wall, should also be able to be used. Thermal loads on the side wall of the furnace vessel and the risk of damage to the electrodes when charging the scrap should be minimized or avoided entirely.
  • the charging shaft interior is connected to the furnace interior via an opening provided on the cover and
  • electrodes which are directed obliquely into the furnace interior protrude approximately towards the center of the electric arc furnace.
  • an electric arc furnace in which several electrodes arranged on a pitch circle are arranged near the side wall of the upper part of the electric arc furnace and protrude vertically into the furnace interior through the cover.
  • the electric arc furnace is provided with a shaft attached to the cover, in which the hot furnace gas heats the scrap charged in the shaft.
  • the electrodes are forcibly arranged peripherally surrounding the shaft.
  • a disadvantage of this known electric arc furnace is the enormous thermal load on the side wall of the upper part of the electric arc furnace caused by the electrodes. Arranging the electrodes closer to the center of the furnace suggests difficulties due to scrap pieces falling through the attached shaft.
  • An electric arc furnace is known from PCT application WO 93/13228, the cover of which is penetrated by a charging shaft projecting above the furnace vessel.
  • the charging shaft is off-center of the furnace vessel, which has an elliptical layout arranged Electrodes also project through the cover into the interior of the electric arc furnace, these electrodes also being arranged off-center of the furnace interior.
  • a thermal load on the side wall of the furnace can be reduced compared to the electric arc furnace known from DE-C - 3609 923, but it is not possible to melt the scrap charged via the charging shaft directly by means of an arc, since the scrap cone does not rise up extends to the arcs
  • the furnace vessel is difficult to manufacture due to its elliptical layout.
  • a very flat arc can be generated in the interior of the furnace by the electrodes penetrating the side wall of the upper part or the lid of the furnace vessel. Electrode angles from the horizontal of up to 10 ° are possible, so that the scrap can be melted from top to bottom through the arc.
  • the side wall of the upper part of the electric arc furnace is not exposed to direct heat since the arc primarily radiates heat perpendicular to the axis of the arc.
  • the furnace vessel is designed in a simple manner, in particular of the upper part protruding from the base part, since only openings for the passage of the electrodes have to be provided here.
  • the construction is even easier if the electrodes penetrate the lid of the furnace vessel.
  • there is the advantage of an especially simple design electric arc furnace which enables a high, uniform energy input with low electrode consumption (short glowing electrode length) .At the same time, however, an integrated preheating of the scrap mountain in the furnace vessel is ensured by melt gases rising from the bottom.
  • the electrodes can advantageously be tilted about a horizontal axis by means of electrode support devices, and so on. in particular in a range between 10 and 60 °, preferably between 30 and 60 °, to the horizontal.
  • the electrodes are expediently supported in their longitudinal direction by means of the electrode support device
  • the electrodes used are expediently supported by the electrode support device so that they can be pivoted about a vertical axis. In this way, it is possible to ensure a large area of action of the electrodes with a minimum number of electrodes.
  • the charging shaft is advantageously rigidly connected to the lid of the electric arc furnace, etc. especially when the charging shaft is only slightly tall. This is sufficient in the case of not extremely high production outputs.
  • the charged scrap does not reach into the charging shaft, but forms a truncated cone-shaped pile located exclusively in the furnace interior, which enables the use of the inclined electrode principle
  • the charging shaft can be moved relatively with respect to the cover, the charging shaft being expediently movable laterally, etc. in a direction perpendicular to the longitudinal central axis of the charging shaft or the upright electric arc furnace.
  • the charging shaft can be moved relatively with respect to the cover, the charging shaft being expediently movable laterally, etc. in a direction perpendicular to the longitudinal central axis of the charging shaft or the upright electric arc furnace.
  • a sliding sleeve which can be moved in the direction of the longitudinal central axis of the charging shaft or the electric arc furnace is provided, the lower end of the charging shaft expediently being at a distance is arranged above the cover of the electric arc furnace and the space between cover and charging shaft which can be bridged as a result can be bridged by means of the sliding sleeve It is particularly advantageous here if the extension of the sliding sleeve in the direction of the longitudinal central axis of the charging shaft is greater than the height of the free space between the lid and the charging shaft, because this makes it possible to form scrap cones with different dimensions in the furnace interior, etc. by choosing an appropriate height of the lower edge of the sliding sleeve.
  • the sliding sleeve thus allows the contour of the scrap falling from the charging shaft into the furnace interior to be adjusted when the first partial quantities are being charged.
  • the scrap falling into the furnace interior when charging the first partial quantities from the charging shaft forms a pouring cone which has a repose angle corresponding to the respective physical scrap composition (size of the scrap pieces, type of scrap pieces).
  • This bulk cone can be adjusted to the desired size by lifting and lowering the sliding sleeve in its largest diameter, whereby the scrap on the side wall can be kept below the electrode bushings through the side wall.
  • a preferred embodiment is characterized in that the charging shaft is provided with a charging opening passing through its side wall, which can be closed by means of a charging door, the charging door expediently being displaceable horizontally or vertically from the closed position into an open position and vice versa, and advantageously being water-cooled.
  • the charging shaft is provided with a charging opening passing through its side wall, which can be closed by means of a charging door, the charging door expediently being displaceable horizontally or vertically from the closed position into an open position and vice versa, and advantageously being water-cooled.
  • the charging opening is advantageously equipped on its lower edge with a water-cooled support for a charging device, such as a scrap chute
  • the charging shaft is expediently provided with a charging opening passing through its side wall, to which a conveying device, such as e.g. a conveyor belt opens
  • a further preferred embodiment is characterized in that the charging shaft also has a side wall with a further charging opening to which an addition chute for charging cold or hot feed and / or additives is provided connects, is provided.
  • This makes it possible, for example, to also charge hot sponge iron into the electric arc furnace, for which purpose the hot sponge iron can be delivered to the electric arc furnace in pear-shaped vessels flooded with nitrogen.
  • the vertically projecting electrodes and the electrode structures would make it difficult to overcome difficulties.
  • the charging shaft can expediently be connected to an exhaust pipe at its upper end.
  • the side wall of the charging shaft is provided with a plurality of nozzles for supplying an oxygen-containing gas, a plurality of nozzles advantageously passing through the side wall of the charging shaft and the nozzles being arranged in the form of a ring which peripherally surrounds the side wall.
  • At least one lance supplying an oxygen-containing gas penetrates the wall or the lid of the furnace vessel.
  • the electrodes preferably protrude through the side wall of the upper part.
  • a wall area which tapers upwards is provided between the charging shaft and the part of the side wall thereof which is oriented essentially parallel to the vertical central axis of the electric arc furnace and the electrodes protrude into the furnace interior through openings arranged in this wall area, expediently the wall area tapering upwards is assigned to the cover of the electric arc furnace
  • the upwardly tapering wall area is assigned to the side wall of the electric arc furnace
  • a particularly simple construction in which only a slight displaceability of the sliding sleeve ensures the full tiltability of the furnace vessel is characterized that the sliding sleeve on the lid is arranged such that it can be raised and lowered, the sliding sleeve expediently having approximately the same diameter as the lower end of the charging shaft and the sliding sleeve being arranged on the lid so as to be vertically movable by a maximum of 200 mm, preferably by 50 mm.
  • FIGS. 1 and 2 illustrating a vertical axial section through an embodiment of an electric arc furnace in each case.
  • 3 shows an oblique view of the electric arc furnace shown in FIG. 2, but with the charging shaft moved laterally.
  • FIG. 4 is a side view of a further embodiment of an electric arc furnace
  • FIG. 5 shows the electric furnace shown in FIG. Arc furnace in plan, but on a smaller scale and in a very schematic representation.
  • Fig. 6 shows another embodiment, also in vertical section. 7 to 9 explain the function of a sliding sleeve of an electric arc furnace of the type similar to that shown in Fig. 2, but with an afterburning device.
  • Fig. 10 shows an embodiment of an electric arc furnace, which is also equipped with an afterburning device in vertical section;
  • Fig. 1 1 is the associated floor plan. 12 and 13 illustrate further embodiments in a schematic sectional illustration.
  • a furnace vessel 1 of an electric arc furnace has a trough-shaped recessed base part 2, which is lined with refractory material 3 and is equipped with a bixlen anode 4.
  • the base part 2 is supported on the foundation 5 by means of a tilting axis 6; the tilting is accomplished by means of a pressure medium cylinder 7, which is articulated on the one hand on the foundation 5 and on the other hand on a supporting structure 8 of the base part 2.
  • a container 12 holding the melt 10 or slag 11 can be brought into position.
  • the base part 2 Connected to the base part 2 is an upper part 13 projecting from it with a side wall 15 oriented approximately parallel to the vertical central axis 14 of the electric arc furnace.
  • the side wall 15 can be formed by a water-cooled or fireproof-lined metal jacket.
  • the upper part 13 of the electric arc furnace is closed with an expediently water-cooled cover 16, which is preferably removable by swiveling but also by lifting.
  • a charging shaft 17 is arranged centrally on the lid 16, the charging shaft interior 1 being connected to the through an opening 19 provided on the lid 16 Furnace interior 20 is connected.
  • the vertical central axis 14 of the electric arc furnace is, when the electric arc furnace is upright, identical to the longitudinal central axis of the charging shaft 17.
  • the largest diameter 21 of the slightly conically expanding charging shaft interior 18 is considerably smaller than the diameter 22 of the upper part 13 of the electric -Arc furnace; it is preferably about half the diameter 22 or less.
  • the charging shaft 17 has a charging opening 24 which passes through its side wall 23 and can be closed with a charging door 25.
  • the charging door 25 can be moved along the outside of the charging shaft 17, etc. in the circumferential direction.
  • guide strips 26 are provided on the outside of the charging shaft, on which the charging door 25 is guided by means of rollers 27 or brackets 28.
  • the charging shaft 17 is closed with a removable cover 29, so that the interior 18 of the charging shaft 17 is easily accessible for maintenance work etc.
  • An exhaust pipe 30 connects to the upper end of the charging shaft.
  • Electrodes 31 project through the vertical side wall 15 of the upper part 13 of the electric arc furnace in an approximately radially symmetrical arrangement obliquely downwards into the furnace interior 20. These electrodes are aligned approximately towards the center, ie against the vertical central axis 14 of the electric arc furnace.
  • the electrodes 31 are held by electrode support devices 33 supported on the furnace platform 32. These electrode support devices 33 can be tilted about a horizontal axis, as a result of which the electrode angle ⁇ can be adjusted to the desired dimension with respect to the horizontal.
  • the electrodes 31 can also be moved in their longitudinal direction by means of the electrode support device 33, etc. by means of electrode holders 34 which can be moved on the electrode support device.
  • the electrode support devices 33 can expediently also be pivoted about a vertical axis, so that the electrode tips 35 in the furnace interior 20 can cover a certain area, as can be seen in particular from FIG. 5 by double arrows
  • the charging shaft 17 is rigidly connected to the cover 16, but a simple disassembly of the charging shaft 17 is possible for the purpose of carrying out repair work, replacement of parts etc.
  • the charging shaft is also used the furnace vessel tipped when tapping This embodiment is useful in the event that extremely high production outputs are not required.
  • the charging shaft is only so high that it can only accommodate a lateral charging opening 24, which can be closed with a sliding or movable charging door 25.
  • the scrap is charged through this charging opening 24 into the furnace vessel 1, whereby it forms a truncated cone-shaped pile in the furnace vessel 1 the use of the inclined electrode principle is permitted. In this case, the scrap does not reach the charging shaft.
  • the charging shaft 17 has a substantially greater height and is equipped with one or, as shown in FIG. 2, with two charging openings 24, 24 ′, one above the other, which in turn can each be closed with a charging door 25.
  • the charging doors 25 can be arranged on the charging shaft 17 so as to be movable laterally as well as in the vertical direction; it would also be conceivable to arrange the charging doors 25, as shown in FIG. 6, to be pivotable about a horizontal or vertical axis on the charging shaft 17.
  • the vertical mobility of the charging doors 25 offers the advantage that the charging opening 24 only has to be opened upward by slowly moving the charging door 25 upwards as it corresponds to the instantaneous angle of inclination of a scrap chute 36 delivering the scrap.
  • the clear width of the charging opening 24, 24 ' can be limited to a minimum.
  • the guide rails 37 or guide strips 26, along which the charging doors 25 are movable, are designed so that the charging doors 25 are slightly lifted off in the radial direction from the side wall 23 of the charging shaft 17 and lie as close as possible to the side wall 23 when closed.
  • the lower edge of the charging opening 24 is formed according to the embodiment shown in FIG. 2 by a thick-walled water-cooled bar 38 onto which the scrap chute 36 can be placed without the side wall 23 of the charging shaft 17 being damaged.
  • Racks with geared motors, cable drums or hydraulic cylinders can be used as the movement mechanism for the charging doors 25.
  • the lower end of the charging shaft 17 is at a distance 39 above the cover 16 of the electric arc furnace.
  • the free space thus present between the cover 16 and the charging shaft 17 is bridged by means of a sliding sleeve 40 surrounding the charging shaft 17.
  • the sliding sleeve 40 can move from a lowest position shown in FIG. 2 to a top position, for example shown in FIG. 9 to be spent.
  • the electric arc furnace can thus be tilted independently of the charging shaft 17, as is illustrated in FIG. 9.
  • the charging shaft 17 is advantageous, as can be seen in particular in FIG. 3, can be moved laterally relative to the furnace vessel 1, for which purpose it is fastened on a support structure 41 which can be moved along rails 42 arranged laterally to the side of the electric arc furnace and above it In this case, the charging shaft 17 remains in the vertical position.
  • the necessary space (gap) between the charging shaft 17 and the tiltable furnace vessel 1 can also be created by lifting the charging shaft 17.
  • the furnace interior 20 of the electric arc furnace is easily accessible and, for example, very large pieces of scrap can be introduced directly into the furnace interior 20. Furthermore, when the charging shaft 17 is moved to the side, it is easy to carry out repair and maintenance work in the furnace interior 20, for example on the furnace lining or on the floor anode 4, as well as on the charging shaft 17 moved to the side and on the sliding sleeve 40.
  • the sliding sleeve 40 is expediently designed as a water-cooled “pipe to pipe” construction and is made from thick-walled, heat-resistant pipes.
  • the coils are advantageously arranged vertically so that the charged scrap can slide off easily.
  • the sliding sleeve 40 can also be designed as a water-cooled box construction, the inner jacket plate of the sliding sleeve 40 being made of thick-walled, heat-resistant sheet metal in order to withstand the abrasion caused by the scrap.
  • water-guiding ribs are advantageously arranged in the interior in a horizontal direction, whereby the section modulus is increased and better dimensional stability of the sliding sleeve 40 can be achieved.
  • the coolant flow is from bottom to top, i.e. the lower area, which is exposed to greater heat, comes into contact first with the cooler coolant; the heated coolant rises.
  • the sliding sleeve 40 can be designed as a one-piece closed cylinder jacket or consist of two or more parts which are joined to form a cylinder jacket.
  • the drive for the vertical movement of a sliding sleeve 40 takes place by means of three or more hydraulic cylinders or cable drums, the drive units at a sufficient distance - protected from inadmissible temperature exposure - on the Support structure 41 of the charging shaft 17 are arranged. Chains or bars can serve as a connection between the drive units and the sliding sleeve 40.
  • the sliding sleeve 40 is brought into the lowest position, in which it protrudes into the furnace interior 20. It thus ensures a specific contour 43 of the scrap column 44 running out of the charging shaft 17, the diameter being limited at the foot of the scrap column 44, which tapers apart in a conical shape
  • the charging shaft 17 is filled with scrap, i.e. the scrap column 44 standing on the base part of the electric arc furnace extends into the interior 18 of the charging shaft 17, the charging shaft 17 is fixed and locked with the electric arc furnace in such a way that neither the charging shaft 17 nor the furnace vessel 1 can be moved against one another.
  • the sliding sleeve 40 can be pulled up not only to release the furnace vessel 1 for tilting for the purpose of slagging and for parting off, but also for the purpose of supplying false air between the lower end of the charging shaft 17 and the opening 19 of the cover 16 for the afterburning of those arising during the melting process To achieve CO.
  • a plurality of nozzles 46 are provided on the charging shaft 17 for supplying an oxygen-containing gas for the purpose of afterburning the CO. These nozzles 46 pass through the side wall 23 of the charging shaft 17 and are arranged in the form of a ring 47 or a plurality of surrounding rings 47 which surrounds the side wall 23 of the charging shaft 17 peripherally, and compressed air is preferably supplied as the oxygen-containing gas
  • the flammable gases which are mainly formed by CO
  • the hot post-burned gases are sucked up via the scrap column 44 to the suction line 30, which is connected to the charging shaft 17, and preheat the scrap column 44.
  • charging in the charging shaft 17 can also take place in a continuous manner, for example by means of a continuously operating conveyor belt 49.
  • a vibration conveyor device 50 or a correspondingly strongly inclined sliding surface is expediently provided.
  • a pear-shaped transport vessel 53 is used to introduce hot sponge iron 52 or briquettes formed from sponge iron 52, into which the sponge iron 52 is filled from the direct reduction system. After the iron sponge 52 has been filled in, this transport vessel 53 is flooded with nitrogen, closed at the mouth 54 and brought to the electric arc furnace according to the invention. There it is tilted by 180 ° so that the closed mouth 54 is now at the bottom.
  • the charging shaft 17 has a side wall opening 55 which is used for charging the sponge iron 52, from which an addition chute 56 protrudes obliquely upwards onto this addition chute 56, which is attached to the supporting structure 41 of the charging shaft 17 is supported, the pear-shaped transport vessel 53 is placed, whereupon the mouth 54 of the transport vessel 53 is opened and the sponge iron 52 can get into the furnace interior 20 via the addition chutes 56, etc. using gravity, as illustrated in Figure 6
  • a well-protected arrangement of the electrodes 31 can also be achieved in that they penetrate a part of the lid 16 of the furnace vessel 1 that widens conically outwards.
  • This construction enables particularly good access to the interior of the furnace vessel 1 by the cover 16 together with the charging shaft 17 being movable to the side.
  • the cover 16 with the charging shaft 17, e.g. can be connected to a unit via its supporting structure 41.
  • the cover is preferably lifted on the charging shaft 17 or its supporting structure 41 by means of a hydraulic lifting mechanism.
  • the sliding sleeve 40 is arranged on the cover 16 and can be moved in height by means of the actuating devices 61 designed as pressure medium cylinders, which act on the one hand on the cover 16 and on the other hand on the sliding sleeve 40.
  • the sliding sleeve 40 has approximately the same or a larger diameter as the lower end of the charging shaft 17 and can be raised and lowered by the dimension 62 (FIG. 12 shows the lowered position of the sliding sleeve 40).
  • This dimension 62 is just dimensioned so that the free tiltability of the furnace vessel 1 is guaranteed with charging shaft 17 remaining in place; a measure of about 50 mm is sufficient; however, up to 200 mm are possible.
  • the sliding sleeve 40 thus forms a shaft ring which extends the side wall 23 of the charging shaft 17.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Discharge Heating (AREA)
  • Furnace Details (AREA)

Abstract

L'invention concerne un four à arc électrique pour la fusion de ferrailles qui permet un rendement élevé tout en étant de structure aussi simple que possible, dans lequel les charges thermiques de la paroi latérale dues aux électrodes et les détériorations affectant les électrodes lors du chargement des ferrailles soient évitées. Ce four à arc électrique se caractérise par la combinaison des éléments suivants: une sole (2) qui reçoit la matière fondue (10), une partie supérieure (13) comportant une paroi latérale (15), qui fait saillie à partir de la sole (2), un couvercle (16) qui recouvre la partie supérieure (13), un puits de chargement (17) disposé de manière approximativement centrée par rapport à la partie supérieure (13) et dont le diamètre (21) est nettement inférieur à celui de la partie supérieure (13). L'espace intérieur du puits de chargement (18) communique avec l'intérieur du four (20) par l'intermédiaire d'une ouverture (19) pratiquée dans le couvercle (16), et des électrodes, montées approximativement avec une symétrie radiale et dirigées obliquement dans l'intérieur du four, font saillie approximativement vers le centre (14) du four à arc électrique.
PCT/AT1995/000064 1994-06-28 1995-03-30 Four a arc electrique pour la fusion de ferrailles Ceased WO1996000877A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US08/605,011 US5835524A (en) 1994-06-28 1995-03-30 Scrap-melting electric arc furnace
EP95912948A EP0719402A1 (fr) 1994-06-28 1995-03-30 Four a arc electrique pour la fusion de ferrailles
DE29580394U DE29580394U1 (de) 1994-06-28 1995-03-30 Schrotteinschmelz-Elektro-Lichtbogenofen
JP8502629A JPH09502514A (ja) 1994-06-28 1995-03-30 スクラップ溶解アーク炉
KR1019960700940A KR100236482B1 (en) 1994-06-28 1996-02-26 Electric arc scrap furnace

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA1270/94 1994-06-28
AT0127094A AT403846B (de) 1994-06-28 1994-06-28 Schrotteinschmelz-elektro-lichtbogenofen

Publications (1)

Publication Number Publication Date
WO1996000877A1 true WO1996000877A1 (fr) 1996-01-11

Family

ID=3510249

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AT1995/000064 Ceased WO1996000877A1 (fr) 1994-06-28 1995-03-30 Four a arc electrique pour la fusion de ferrailles

Country Status (7)

Country Link
US (1) US5835524A (fr)
EP (1) EP0719402A1 (fr)
JP (1) JPH09502514A (fr)
KR (1) KR100236482B1 (fr)
AT (1) AT403846B (fr)
DE (1) DE29580394U1 (fr)
WO (1) WO1996000877A1 (fr)

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DE19807590A1 (de) * 1998-02-23 1999-08-26 Arcmet Tech Gmbh Chargiergutvorwärmer
WO2001056916A3 (fr) * 2000-02-01 2003-03-13 Kress Corp Installation et procede de fabrication d'acier

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AT407752B (de) * 1999-04-22 2001-06-25 Voest Alpine Ind Anlagen Verfahren und einrichtung zum einschmelzen von metallhältigem material
WO2001004559A1 (fr) 1999-07-08 2001-01-18 Nkk Corporation Equipement et procede de fusion a l'arc pour source de fonte brute froide
US6584137B1 (en) 2002-07-22 2003-06-24 Nucor Corporation Method for making steel with electric arc furnace
FR2879624B1 (fr) * 2004-12-17 2007-03-02 Ile Barbe Davene Soc Civ Cuve suspendue pour reacteur metallurgique
EP2280088A1 (fr) 2009-07-31 2011-02-02 Siemens Aktiengesellschaft Dispositif de déversement d'un récipient de fusion métallurgique, agencement de fusion métallurgique et procédé sous utilisation d'un tel agencement de fusion

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FR2627578A1 (fr) * 1988-02-22 1989-08-25 Outokumpu Oy Four a fusion et procede pour introduire dans celui-ci le materiau a traiter
EP0548041A2 (fr) * 1991-11-18 1993-06-23 Voest-Alpine Industrieanlagenbau Gmbh Four à arc électrique pour la production d'acier
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US6404800B1 (en) 1998-02-23 2002-06-11 Arcmet Technologie Gmbh Charging material preheater with replaceable shaft wall portions
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EP0719402A1 (fr) 1996-07-03
DE29580394U1 (de) 1996-06-20
JPH09502514A (ja) 1997-03-11
AT403846B (de) 1998-05-25
ATA127094A (de) 1997-10-15
KR960704206A (ko) 1996-08-31
US5835524A (en) 1998-11-10
KR100236482B1 (en) 2000-03-02

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